Knife-grinding attachment for meat-grinding machines



1,631,491 June 7, 1927- e. s. KLEIN KNIFE GRINDING ATTACHMENT FOR MEAT GRINDING MACHINES Filed March 27. 1926 QJZZZiZ Patented June 7, 1927.

UNITED STATES GEORGE S. KLEIN, OF GRANGER, WASHINGTON.

KNIFE-GRINDING ATTACHMENT FOR MEAT-GRINDING MACHINES.

Application filed March 27, 192(5. Serial No. 98,040.

This invention has reference to a knife grinding or sharpening device, the important object of the invention being to provide a device of this character which may be readily and easily secured to the outer end of the usual blade carrying shaft of a meat grinding machine, thereby converting the usual meat grinding machine into a sharpening machine.

Another important object of the invention is to provide an attachment embodying a plurality of gears so arranged that they will increase the speed of rotation of the grinding wheel or disk carried by the machine, to facilitate the sharpening operation.

A still further object ofthe invention is to provide an attachment of this character which will be fool-proof, and one wherein the gears may run in oil or grease to insure the long life of the machine.

With the foregoing and other objects in 7 view which will appear as the description proceeds, the invention resides in the combi nation. and arrangement of parts and in the details of construction hereinafter described and claimed, 'it' being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

Referring to the drawing:

Figure 1 is a longitudinal sectional View through an attachment constructed in accordance with the invention.

Figure 2 is a sectional view taken on line I 2-2 of Figure 1.

teferring to the drawing in detail, the device includes a shell or casing 5 which is formed with an opening in which the bear ing 6 is mounted, which bearing accommodates the shaft 7 forming a part of the ring gear 8.

In one end of the shaft 7 is a socket 9 adapted to receive the usual squared end of the knife supporting shaft of a meat grinding machine so that the attachment may be operated by the rotation of the usual crank or operating wheel of a'meat grinding machine. 1 V

Internal threads 10 are formed within the casing 5 and accommodate the threads of the bearing member 11, which is formed with a circular flange 12 designed to abut one edge of the ring gear 8 as clearly shown by Figure 1. Bearing 13 is mounted within the bearing member 11 and accommodates the main shaft 1 1 of the attachment which carries pinion 15 atits inner end, therebeing provided a collar 16 on the shaft 14 to hold the shaft against movement longitudinally of the bearing 13.

The reference character 17 indicates the grinding stone or wheel, and is provided with an opening so that it may be positioned over theouter end of the shaft 14 in a manner as shown by Figure 1. A threaded opening is formed in the outer end of the shaft 14; and accommodates the securing of the stone 17 to hold it in position.

The pinion 15 receives motion from the ring gear 8, and due to the construction of the attachment it will be obvious that the space between the interior of the ring gear and inner end of the bearing member 11 may be filled with grease or other lubricant, to the end'that the pinion and gear will be thoroughly lubricated at all times to insure the long life .of the mechanism.

From the foregoing it will be obvious that the speed of the shaft 14 Will begreatly increased over the speedyo f' rotation of the shaft 7, to the end that the usual grinding machine'may'be converted into an eflicient grinding or sharpening machine.

I claim:

In a device of the character described, a casing having internal threads, a ring gear positioned within the casing and embodying a shaft, said shaft extending through the casing and having a socket to be positioned to be fitted within the casing to engage the internal threads and connect the bearing member and easing, a circular flangeforming a part of the bearing member and'contacting with one edge of the ring gear to hold the same against movement longitudinally of thecasing, a shaft extending into the bearing member and having a pinion meshing with the ring gear, and a grinding stone mounted on the shaft.

In testimony that I claim the foregoing asmy own, I have hereto affixed my signature.

GEORGE sKLEiN. I 

